我有一些带有默认名称空间的xml
<a xmlns='urn:test.Schema'><b/><b/></a>
并想数 <b/>
我该如何定义
XmlNamespaceManager nsmgr = ????
Assert.AreEqual(2, doc.SelectNodes("//b", nsmgr).Count);
这样断言变为事实？
到目前为止，我已经尝试过（使用nunit）：
[Test]
[Ignore("Why does this not work?")]
public void __DoesNotWork_TestSelectWithDefaultNamespace()
{
// xml to parse with defaultnamespace
string xml = @"<a xmlns='urn:test.Schema'><b/><b/></a>";
XmlDocument doc = new XmlDocument();
doc.LoadXml(xml);
// fails because xpath does not have the namespace
//!!!!
Assert.AreEqual(2, doc.SelectNodes("//b").Count);
// using XPath defaultnamespace
XmlNamespaceManager nsmgr = new XmlNamespaceManager(doc.NameTable);
nsmgr.AddNamespace("", "urn:test.Schema");
// This will fail with dotnet 3.5sp1. Why?
//!!!!
Assert.AreEqual(2, doc.SelectNodes("//b", nsmgr).Count);
}
[Test]
public void TestSelectWithoutNamespaces_Ok()
{
// xml to parse without namespace
string xml = @"<a><b/><b/></a>";
XmlDocument doc = new XmlDocument();
doc.LoadXml(xml);
// works ok
Assert.AreEqual(2, doc.SelectNodes("//b").Count);
// works ok
XmlNamespaceManager nsmgr = new XmlNamespaceManager(doc.NameTable);
Assert.AreEqual(2, doc.SelectNodes("//b", nsmgr).Count);
}
[Test]
public void TestSelectWithNamespacesPrefixed_Ok()
{
// xml to parse with defaultnamespace
string xml = @"<a xmlns='urn:test.Schema'><b/><b/></a>";
XmlDocument doc = new XmlDocument();
doc.LoadXml(xml);
// using XPath namespace via alias "t". works ok but xpath is to complicated
XmlNamespaceManager nsmgr = new XmlNamespaceManager(doc.NameTable);
nsmgr.AddNamespace("t", doc.DocumentElement.NamespaceURI);
Assert.AreEqual(2, doc.SelectNodes("//t:b", nsmgr).Count);
}